Synthesis of monodisperse 伪-Fe<sub>2sub>O<sub>3sub> deep-submicron spheres and its application in Li-ion batteries
- 作者：Lihong Huang<sup>asup><sup> ; sup><sup>bsup> ; Ding Zhu<sup>asup> ; Yungui Chen<sup>asup><sup> ; sup><sup>ygchen60@yahoo.com.cnsup> ; Chaoling Wu<sup>asup> ; Huaibing Sun<sup>asup> ; Hong Yang<sup>asup>
- 关键词：Semiconductors ; Electrical properties ; 伪-Fe2O3 ; Hydrothermal method ; Li-ion batteries
- 刊名：Materials Letters
- 出版年：2012
- 期刊代码：59_0167577x
- 类别：ms
- 出版时间：1 May, 2012
- 卷：74
- 期：Complete
- 页码：37-39
- 文件大小：514 K
摘要
Monodisperse 伪-Fe<sub>2sub>O<sub>3sub> deep-submicron spheres of about 200 nm in diameter were successfully synthesized by a facile hydrothermal process based on a Fe(OH)<sub>3sub> precursor without using any complexing agents, surfactants or templates. The 伪-Fe<sub>2sub>O<sub>3sub> deep-submicron spheres were investigated with X-ray diffraction, scanning electron microscope and electrochemical tests toward lithium storage. For comparison, properties of commercial Fe<sub>2sub>O<sub>3sub> were also investigated in this paper. It was found that the as-obtained 伪-Fe<sub>2sub>O<sub>3sub> showed a high initial reversible capacity of 1681 mAh g<sup>鈭?#xA0;1sup> and the specific capacity remained 1167 mAh g<sup>鈭?#xA0;1sup> after 30 cycles at a current density of 150 mA g<sup>鈭?#xA0;1sup>. However, the reversible capacity of the commercial Fe<sub>2sub>O<sub>3sub> particles faded to 370 mAh g<sup>鈭?#xA0;1sup> immediately and then gradually decreased to 263 mAh g<sup>鈭?#xA0;1sup> after 30 cycles.